147 lines
3.1 KiB
C
147 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/init.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/range.h>
|
|
|
|
#include "bus_numa.h"
|
|
|
|
LIST_HEAD(pci_root_infos);
|
|
|
|
static struct pci_root_info *x86_find_pci_root_info(int bus)
|
|
{
|
|
struct pci_root_info *info;
|
|
|
|
list_for_each_entry(info, &pci_root_infos, list)
|
|
if (info->busn.start == bus)
|
|
return info;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
int x86_pci_root_bus_node(int bus)
|
|
{
|
|
struct pci_root_info *info = x86_find_pci_root_info(bus);
|
|
|
|
if (!info)
|
|
return NUMA_NO_NODE;
|
|
|
|
return info->node;
|
|
}
|
|
|
|
void x86_pci_root_bus_resources(int bus, struct list_head *resources)
|
|
{
|
|
struct pci_root_info *info = x86_find_pci_root_info(bus);
|
|
struct pci_root_res *root_res;
|
|
struct resource_entry *window;
|
|
bool found = false;
|
|
|
|
if (!info)
|
|
goto default_resources;
|
|
|
|
printk(KERN_DEBUG "PCI: root bus %02x: hardware-probed resources\n",
|
|
bus);
|
|
|
|
/* already added by acpi ? */
|
|
resource_list_for_each_entry(window, resources)
|
|
if (window->res->flags & IORESOURCE_BUS) {
|
|
found = true;
|
|
break;
|
|
}
|
|
|
|
if (!found)
|
|
pci_add_resource(resources, &info->busn);
|
|
|
|
list_for_each_entry(root_res, &info->resources, list)
|
|
pci_add_resource(resources, &root_res->res);
|
|
|
|
return;
|
|
|
|
default_resources:
|
|
/*
|
|
* We don't have any host bridge aperture information from the
|
|
* "native host bridge drivers," e.g., amd_bus or broadcom_bus,
|
|
* so fall back to the defaults historically used by pci_create_bus().
|
|
*/
|
|
printk(KERN_DEBUG "PCI: root bus %02x: using default resources\n", bus);
|
|
pci_add_resource(resources, &ioport_resource);
|
|
pci_add_resource(resources, &iomem_resource);
|
|
}
|
|
|
|
struct pci_root_info __init *alloc_pci_root_info(int bus_min, int bus_max,
|
|
int node, int link)
|
|
{
|
|
struct pci_root_info *info;
|
|
|
|
info = kzalloc(sizeof(*info), GFP_KERNEL);
|
|
|
|
if (!info)
|
|
return info;
|
|
|
|
sprintf(info->name, "PCI Bus #%02x", bus_min);
|
|
|
|
INIT_LIST_HEAD(&info->resources);
|
|
info->busn.name = info->name;
|
|
info->busn.start = bus_min;
|
|
info->busn.end = bus_max;
|
|
info->busn.flags = IORESOURCE_BUS;
|
|
info->node = node;
|
|
info->link = link;
|
|
|
|
list_add_tail(&info->list, &pci_root_infos);
|
|
|
|
return info;
|
|
}
|
|
|
|
void update_res(struct pci_root_info *info, resource_size_t start,
|
|
resource_size_t end, unsigned long flags, int merge)
|
|
{
|
|
struct resource *res;
|
|
struct pci_root_res *root_res;
|
|
|
|
if (start > end)
|
|
return;
|
|
|
|
if (start == RESOURCE_SIZE_MAX)
|
|
return;
|
|
|
|
if (!merge)
|
|
goto addit;
|
|
|
|
/* try to merge it with old one */
|
|
list_for_each_entry(root_res, &info->resources, list) {
|
|
resource_size_t final_start, final_end;
|
|
resource_size_t common_start, common_end;
|
|
|
|
res = &root_res->res;
|
|
if (res->flags != flags)
|
|
continue;
|
|
|
|
common_start = max(res->start, start);
|
|
common_end = min(res->end, end);
|
|
if (common_start > common_end + 1)
|
|
continue;
|
|
|
|
final_start = min(res->start, start);
|
|
final_end = max(res->end, end);
|
|
|
|
res->start = final_start;
|
|
res->end = final_end;
|
|
return;
|
|
}
|
|
|
|
addit:
|
|
|
|
/* need to add that */
|
|
root_res = kzalloc(sizeof(*root_res), GFP_KERNEL);
|
|
if (!root_res)
|
|
return;
|
|
|
|
res = &root_res->res;
|
|
res->name = info->name;
|
|
res->flags = flags;
|
|
res->start = start;
|
|
res->end = end;
|
|
|
|
list_add_tail(&root_res->list, &info->resources);
|
|
}
|